Long before the handy mobile phones that we are so familiar with today, what came into existence that made communication very easy for us was telephones. A wonderful invention that could save time and connect people across the miles, especially in the times of need and emergency, telephones and its invention date back many years. The credit for the invention of the device have been given to many, but it is strongly believed that the person who gave the world a ‘sound telegraph’, Antonio Meucci is the most widely accepted name in the world, related to this domain and the time goes back to the year 1874. However, the modern model of telephone came into existence in the mid twentieth century especially to assist in the communication process during the war torn periods, both within the nation and without.
Detailed studies on telephones reveal that these are nothing but devices that can transmit sound waves and energies which are mainly in the form of speeches. These speeches are transformed into electric signals which are passed on through very complicated telephone network and at the receiving end these signals are again converted back to speeches. The person calling will have to dial certain telephone numbers of the receptor and then when the party on the other end picks up the phone, then the person calling will have to peak onto the speaker contained within the handsets of the telephones. It is then carried on through the network as signals which depend on the acoustic pressure of the sound or speech emitted by the speaker. These signals then get amplified as sound waves at receiving end through the speaker which is again attached to the handset. Today, almost every household across the world still possess the traditional telephones alongside the chic mobile phones. However mobile phones too work on the same principle as ordinary telephones do.
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